Table 40 Juniperus horizontal is/Andropogon scoparius-Agropyron spicatum 



Type Productivity. This type is minor on the square mile (29.8 km^) section 

 proposed mine area, but is important to wildlife and is very diverse. Pro- 

 ductivity sampling of this type poses many problems in sampling design and 

 execution. For this reason, it was not sampled for productivity. 



It was hoped that productivity could be estimated for the microphanero- 

 phyte dominants using the works of Brown (1976) and Ohmann et al. (1976). 

 Although neither paper mentions S^. argentea , and DNRC researchers hoped that 

 productivity could be estimated using a similar species, none of the species 

 in these papers is morphologically similar to S^. argentea . which has a deter- 

 minate growth form. Moreover, none of the species studied approximates the 

 large diameters often found in S_. argentea . Therefore, no attempt at esti- 

 mating productivity has been made for this species. 



Brown (1976) lists regression equations for Prunus virginiana ; leaf 

 weight and total above ground weight have been estimated for this species. 



72 



